Question

cit este (2-√3) la puterea a 3

Answer 1

$(2- \sqrt{3} )^3=2^3- \sqrt{3} ^3-3 \times 2 \times \sqrt{3} (2- \sqrt{3} )= \\ =8-3 \sqrt{3} -6 \sqrt{3} (2- \sqrt{3} )=8-3 \sqrt{3} -12 \sqrt{3} +18=26-15 \sqrt{3}$